2003/07/18 by A. Perucchi, G. Caimi, H. R. Ott +4 · 1 citation
Materials Science · Physics and Astronomy · #Magnetic Properties of Alloys #Magnetic and transport properties of perovskites and related materials #Rare-earth and actinide compounds #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.92.067401
published as Phys. Rev. Lett. 92, 067401 (2004) · submitted to Phys. Rev. Lett
arxiv created 2003/07/18 · openalex publication_date 2004/02/10 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We have measured the optical reflectivity R(\ensuremathω) of Eu0.6Ca0.4B6 as a function of temperature (T) between 1.5 and 300 K and in external magnetic fields (H) up to 7 T. R(\ensuremathω) increases with decreasing T and increasing H field, but the plasma edge feature does not exhibit the sharp onset and steep slope that is observed in EuB6. The analysis of the H-field dependence of the low-T optical conductivity confirms the previously observed exponential decrease of the electrical resistivity upon increasing bulk magnetization at constant T. The individual exponential magnetization dependences of the plasma frequency and scattering rate are also extracted from the optical data.